Carbureter.



c. A. comm.

CARBURETER.

APPucATloN FILED 1AN.9,19*.

Trixl wi/tmdoow cARuaEreR. y APH-CANON FII-.ED JAN. 9, 19H.

Patented Dec. 7, 1915.

3 SHEETS-SHEET 2- C. A. CORBETT.

' PH @ma @L CARBURETER.

AfPLxcATloN man ums. w15.

Patented Dc. 7,

CABROL A. CORBETT, OF GRAND RAPIDS, MCHIGAN, SIGNGR, BY DRECT .lill MEESNE n ASSIGNMENTS, To

n.APIDs, MICHIGAN.

incassa.

CORBETT-VANDEN BOS GARBURETOR CMPAN'Y, OF GRANB oeiasnianrsn.

Jiatented Dec. l?, :finir Application filed vIanuary 9, 1915. Serial-No. 1,374.

'ST0 all wltm t may concern:

.'Beit known that I, CARROL A.. Coniinr'r, a citizen of the 'United States, residing. at

'i Grand Rapids, in the county of Kent and .State of -Michigan, have invented certain -new and useful Improvements in Carbureters; and I do declare the :following to be .a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

if .Myvinvention relates to improvements in "carbureters and has for its main object to iprovide a device of this' character which may be vsimply and inexpensively constructed, and which may well be used for consuming low grades of fuel, provisionl being made whereby `highly volatile fuel is provided for the initial starting 'of the engine equipped with the'device. y j

To the above end, I employ avnumber of novel -features of construction and combination hereinafter described and claimed and shown in the drawings wherein Figure l is a side elevation of a carbureter vconstructedin accordance with my invention; Fig..2 is a central vertical longitudinal `-section thereof; Fig. 3 is a vertical trans- ,verse Vsection as seen along the planeet the li'ne 3 3 of Fig.`2; Fig. l is a horizontal sectiontaken along the plane ot the line l-l of Fig. 2; Fig. 5 is a detail horizontal section as seen on the line -5 of Fig. 1; Fig. 6 is an enlarged'vertieal section through the lower end of the Venturi tube and through the fuel spray nozzle; Fig. 7 is a side elevation of a tubular stein with which the nozzle is equipped; Fig. 8 is a. planviewl of said stem; Fig. 9 is a vertical section through a fuel cup with which the nozzle is provided;

Fig. 10 is a side elevation ota valveto be described, and a vertical section of its seat and the parts adjacent thereto, and Fig. 11

is a horizontal section taken on the line ii-ii of nig. 2.

In these-drawings, constituting a part of this application, the numeral 1 ydesignates an upright tubular body whose lupper end is provided with an outstanding .annular flange 2 whereby it maybe connected to the intake of an internal combustion engine, while itsv lower end is normally closed by a removable bottom plate 3. The intermediate lportion-- of' the tubl is contracted internally as seen at 4 tofy rovide means for the attachment of `ter, the lower end 4if desired, be connected to or disk being "inlet openings 16, equal in number to the number of openings formed in the spider 13. By this feature of construction, the valve `an upright Venturi tube 5, above which the usual form of throttle valve t3 is located, this valve 6 being provided in the present case with an operating lever 7 located on the ei;- terior of the body 1 and equipped with a pair of adjustable stops 8 adapted to bear against a fixed stop 9 carried by the lange By this,means, the throttle valve 'will be limited in its 'movement when it is being opened or closed.

As is common with devices of thischaraoportion of the upright tubular body 1 constitutes the fixed. air inf take of the carbureter, for which purpose it is here shown as provided with an opening 10 in one of its sides from which opening a tube 11 extends outwardly, which tube may, a source for sup plying warm air. Actual experience has taught that carbiueters constructed -for instance, in one size, will not operate to equal advantage ron high and low powered internal combustion engines. This is due largely to thefact that the airinlet opening 10 will not permit suilicient air to enter the carbureter, when the device is employed in conn plemental means whereby more air may be admitted into the 'fixed air intake and to provide an adjustable valve Jfor controlling the passage of air through such supple mental intake. For this purpose, I have shown one side of the upright body 1 as pro vided with a hollow boss 12 near its lower end, a spider 13 being formed across the opening' in said boss as most clearly seen in Fig. 5. This spider is provi(Y ed for the support of a stub shaft 14 (here shown in lthe form of a screw) upon which a valve plate or disk 15 .is revolubly mounted, this plate provided with a number of air plate 15 may be adjusted to the proper eX- tent for allowing theneceSsai-y amount of vair to enter the lined air intake of the carbureter, after which the screw 14 may be tight- I; ened, thus. permanently locking the valve plate in its adjusted position.

For the purpose of supplying fuel to the Venturi tube 5, an upright tube 2O is passed upwardly through central opening in the bottem plate 3 and has its upper end die posed in the lower end of said tube, this tube' 20 being provided with a tubular eX- tension 21 which extends laterally from one of its sides and whose outer' end is shaped in the form ofl a cone 22 and is seated \vithin a cone seat 23 fith which one side of the body 1 is provided, this, seat being located at a. point directly beneath the contracted portion 4. To'retain the extension 21 in this position,` the side of the tube 20 opposite said extension is provided with a` seat 24 in which the inner conical end of a set screw 25 is disposed, said screw being passed through an opening in one side ofthe body 1 as clearly disclosed in Fig. 2. It may be ,Well to here also explain that the lower end of the tube 2O is likeivisethreaded through a nut 20 under the bottom plate 3. By this construction, it will be seen'that by merely removing this bottom plate 3 and the set screw 25, the tube 20 yand its extension 21 may be easily removedv for the purpose' of cleaning or repairing.

The upper end of the tube 20 constitutes, a support for the fuel spray nozzle, this nozzle A being most clearly 'shown in Fig. Gand comprising an upright tubular stem 26 which is threaded into and rises from the upper end of the tube20, this stem being likewise passed through the bottom 27 of a fuel cup f 28v and beingr provided With a head 29 vwhich contacts with the bottom of said cup'to retain it in' contact with the upper end ofthe tube 20. The head 29 is provided with a plurality of radial openings 30 which are adapted to supply fuel from the tube 20, into the cup 28, from which cup it is drawn upwardly by the air vdrawn through the In order, however, to more readily vaporize the fuel and to cause it to Venturi tube.

more easily mix With the incoming air, the

" head 29 is provided with an annular later- Venturi tube.

ally extending flange 31, this flange overlying the upright annular wall of the vcup 28- and kbeing spaced'a slight distance above the same. By so constructing the device, fuel will be dischargedfrom the nozzle in a circular sheet, which, sheet will be intercepted by the air passing upwardly through `the In addition tg the features just described, thehead 29 is preferably provided with a rectangular projection 32 on its when raised 'by fuel within the chamber, yto

an upright` guide.

actuate the needle valve V t0 close thehinlel. into said chamber. In the present device, the float is so positioned as to maintain the fuel within the chamber (l at such a level as to cause it to at all times fill the cup 28,

' whereby an initial charge of fuel is maintamed in the nozzle at all times.

ln most cases, it becomes highly expedient to provide-some form of valve whereby fuel may be positively prevented from fiowing from the chamber C into the nozzle. In the present instance, a needle valve 40 is shown as threaded with'inithe lowerv end portion of the tube 20, the active end of this valve being adapted to close the inner end ofthe tubular extension 21 `when said valve is ro-` tated by any suitable means with which it may be. equipped. v v The body 1, directly above the contracted intermediate portion 4 thereof, is. shown as provided with a laterally extending branch or housing 45, this housing being provided in its lower side, Wit-h an opening 46 from which'a sleeve 47 depends, said sleeve being here shown as secured to the branch by .a pair of screws 48. The upper end of the sleeve 48 is of slightly less diameter than the lower end thereof and is internally threaded las most clearly disclosed 'at 49 in Figs. 2-and 3, these threads interengaging threads formed on the periphery vof acircular spider 50 Whose center is provided with Mounted for yertical sliding movement within this guide, is an upright needle valve 51 Whose upper end is provided with avertically adjustable cap 52' or the equivalent thereof, while its intermediate portion is equipped with an in verted cone-shaped Valve 53' Whose upper peripheral edge is notched as ,seen at 54.

This valve 53 normally rests upon an annular valve seat 55 which is formed in the hollow yupper end of an upright cylindrical member 56, this upper end beingsecured in any suitable manner Within the enlarged lower end of the sleeve 47 as clearly shown.

As-clearly disclosed in Figs. 2 and 3, the member 56`is provided with a chamber 57 directly beneath the valve 53, this chamber acting as the additional carbureting chamber and being provided with a .number chair inlets 58' and Witha fuel inlet 59, the latter discharging centrally through the bottom ofthe recess or chamber 57 and` being normally closed by the pointed lower end of the needle valve 51 while the former .(the openings 58) are controlled by a perforated valve sleeve 60 which is v revolubly lmounted 'upon the member 56 and which contacts Withthe shoulder thereon. This sleeve 60 preferablyy provided with' connected for adjustingsaidsleeve from a remotepoint.

j j a llaterally extendingarm 6 1 to which an appropriate link may-be' Cil incassa he seen that discharge of mixture from the additional carbureting -chambers isy controlled bythe valve 53, which valve however, may be raised against the tension of its spring 53', when suction is created above said valve. Such suction however, cannot be created until the valve 4 :1 has been closed and until other adjustments to be described have `thirst been ma de.

iisposed in the top of the branchv or housing i5, at a point directly above the opening 46 therein, is a supplemental air intake 7() which is here shown as controlled by an inwardly opening cone valve 71, this valve being normally closed by a coil spring 72 and being provided with a rod 73 which is threaded through the center of its stem and projects into the housing therefrom. Interposed between the lower end of the rod 73 and the upper end of the cap 52, is a transverse horizontal shaft 75 upon which a double-acting cam 76 is secured, this cam being disposed within the housing and being adapted to lockl either the valve 53'or the valve 71 against opening. As shown in the drawings. (see Fig. 2), the .cam is-locking the valve 71 in closed position, the valve il is closed,'thus preventing the passage of kerosene into the carbureter, and the valve 53 is free to open the moment suction is created above the same, this being the nor-- mal condition of parts when starting the engine with which the device is provided. By such positioning of parts, it will be seen that gasolene or other highly explosive fuel will be drawn into the engine cylinders until the latter become heated by the operation of said engine. After this has been accomplished, it becomes expedient to lock the valve 53 against opening, to allow the supplemental air intake valve 71 to open,`and to dispose the valve 41 in such a manner as toallow kerosene. to be drawn into the engine cylinders. For accomplishing this ref sult. one end of the shaft 75 is provided with a crank arm connected by a link 81 to a crank arm 82 which is secured to an additional horizontal shaft 83 which eX- tends transversely through the body 1 and the Venturi tube, saidshaft 83 carrying the valve 4:1 as most clearly disclosed in Figs. 1 and The arm S2 is here shown as provided with a rod 84 by means of which it may be shifted, it being therefore seen that actuation ot' this single rod 84, in the proper direction, `will open the valve eil, and will rotate the cam .76 from the position seen in full lines in F ig. 2 to that seen in dotted lines therein, thus 'preventing the valve 53 from opening', and thereby excluding all gasolene from the carbureter. It will likewise be evident that the supplemental air intake valve 71; is 'then free to act. On the other hand,`v however, when the valve 4l is closed to Vprevent the discharge of kerosene actuated to rotate the valve sl adj usted on the.

It may here be further expiained, that when initially starting the engine, 'the arm 61 is eeve 60 to cie-se the openings 58, thus cai g cylinders to draw inn pure ,si Ev this means, they are etl'ectively pi mi and y it is :insured that quick starting will result. The arm (S1 may then be operated in the proper direction to expose the op v res to the necessary extent, thus fe .s proper mixture to the engine, the latter be ing now allowed to run upon the gasolene for a suitable length of time, after which the rod 84 is shifted to open the valve 41 and prevent opening of the'valve 53. As hereinbefore explained,this operation causes the carbureter to supply a mixture of herosene and air to the engine, but if the latter does not readily run upon such mixture, it is simply necessary to again operate the rod 84 to momentarily check thesupply oit kerosene and admit 'gasolene This may be suc-Y cessivel' vdone until the engine will eectively run upon the kerosene mixture alone.

F rom the foregoing description, taken in connection with the aecompanyingv draw ings, it will be seen that a comparatively simple carlmreter has been provided for carrying out the objects of the invention, thatsuchcarburetor will effectively operate upon fuels of either high or iow grade, and that a number of very novel 'features have been provided for constructing the deviceY in such a manner as to allow such operation the engine f loo signed yet that it is extremely simple. Fury thermore, it is highly desirous to provide the upper peripheral edge of the valve 53 with the notches 54, since a pin may be dropped through the spider 50 and into these notches to prevent' rotation of the valve, when the cap 52 isfbeing rotated and understood that the sleeve 47 and the parts carried thereby, are first removed from' the housing 45, before such adjustments can be made. and that the pin above mentioned prevents rotation oi'both of the valves, -thus allowing the cap to be readily rotated thereon for accomplishing the necessary adjustment.

I claim:

l. Incombination, a pair. of carbureting needlevalve 51, it being ias chambers .having mixture outlets, a. pair of manually operable shafts rotatable in unison, avalve for one outlet actuated by one of said shafts, a suction'opened yvalve for the other outlet, and a locking device actuated by rotation of the other shaft and preventing opening of said suction opened valve 'when the other valve 'is opened.

2. lfn combination, a pair of carbureting chambers having mixture outlets, a pair of ,v manually operable shafts rotatable in unison, a valve for one outlet actuated by one` of said shatts, a suction opened valve for the other outlet, and a locking cam actuated by the other shaft and preventing opening of said suction opened. valve vvhen the other valve is opened.

lncombination, a pair of carbureting chambers having mixture outlets, a pair of -manually operable shafts rotatable in unison, a rotatable valve actuated by one shaft and controlling the .outlet of one carbureting chamber, a suction opened valve controlling the discharge of mixture from the outlet of theA other carbureting chamber,

and alocking cam carried by the other shaft and engaging a, part of. the suction opened chamber having fuel and air inlets, a supplemental air inlet, and a valve for the latter, an additional carbureting chamberhaving a highly volatile fuel inlet, an air inlet, a mixture outlet, and a valve for controlling the latter, combined vvith a double acting locking devicey for locking either of the tvvo valves against opening, an additional valve controlling the. discharge of mixture from the first mentioned carburetiiig chamber, and means to simultaneously operate the locking device and the additional valve.

6; A carbureter .comprising a carbureting chamber having fuel and air inlets, a supplemental air inlet, and a valve for the latter, an additional carbureting chamber having a highly volatile fuel inlet, an air in let, a mixture outlet, and a valve for controlling .the latter, combined with a double acting cam for locking either of the two valves against opening, a shaft upon which said cani is mounted, an additional valve for controlling tlie discharge of mixture from the tiret named carbureting chamber, an addi: tional shaft upon which said additional valve is mounted., and means connecting the tvvo shafts to simultaneously operate the saine.' y

chamber having an air inlet, a fuel inlet, and. a branch above said inlets, an additional carbureting vchamber communicating with the interior of said branch and having a highly volatile fuel inlet, and an air inlet,

a supplemental air inlet likewise communicatingivith the interior of said branch,.a

valve for controlling said supplemental air inlet; an additional valve for controlling the discharge of -mixtiire from the additional carbureting chamber, and a double acting locking member disposed Wit-hin the branch and adapted to be-actuated to lock either of the tivo valves against opening.

8. A carburetor comprising a carbureting chamber having a Venturi tube disposed between its ends, an vair intake and a. fuel intake contiguous to one end of said Venturi tube, a branchv projecting laterally from the carbui'eting chamber adjacent the other end of said tube, an additional carbureting chamber communicating Withsaid branch and having a highly volatile fuel inlet and an air inlet, a valve for controlling the discharge of mixture from the additional carbureting chamber into the branch, a .supplemental air inlet into Said branch, av valve controlling said supplemental air inlet, a double acting locking member adapted to lock either of the valves against opening, and an additional valve in said Venturi tube. Y f

9. A carbureter comprising a carbureting chamber having a Venturi tube disposed between its ends, an air intake and a fuel intake'contiguous to one end of said Venturi tube, -a branch projecting laterally from the carbureting chamber adjacent the other end of said tube, an additional, carbureting chamber communicating with said branch and having a highly volatile fuel inlet and an air inlet, a valve for controllingthe discharge of mixture from the additional oarbureting chamber into the branch, a supplemental air inlet into said branch, a valve controlling said supplemental air inlet, a double acting locking member lock either of the valves against opening, an additional valve in said Venturi tube, and connections between said locking device and said additional valve, for operating the two simultaneously.

10. The combination with a fuel passage- Way, of means for supplying a fuel mixture of relativelyT low combustibility, a cut-oil device for the latter, means for supplying to said passage-way a fuel mixture of relatively high4 conibustibility, said means including a suction opened combination Valve for controlling the entrance of both air-and the highly combustible fuel, a supplemental .7. A. carbureter comprising a carbureting adapted to.

izo

air intake for permitting pure air to enter said passage-Way, and means for locking said combination valve inclosedposition.

11. In combination with'a fuel passageway, of means ffor feeding' a lfuel Ymixture ,of relatively low -combustibility thereto, a

cut-olf device for said means, a supplemental air intake for admitting pure air to said passage-Way, means for admitting to said assage-.Way a fuel mixture of relatively liigh combustibility, said means including a combination valve for cutting olif lboth vair and a high explosive fuel, means independent of said combination valve for controlling the amount of air supplied to it, and 15 means for locking said combination valve.

In testimony whereof I have hereunto set my hand in presence of two .subscribing Witnesses.

CARROL A. CORBETT.

Witnesses:

MARTIN SNEERBET, 3. A. GRIESBAUU 

